package haha;

class Fu{
	int num = 3;
	
	void show(){
		System.out.println(num);
	}
}

class Zi extends Fu{
	int num = 4;
	
	void show(){
		System.out.println(num);
		System.out.println(this);
		
	}
}

class Test{
	public static void main(String[] args){
		Zi z = new Zi();
		
		z.show();
	}
}